CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 36, Issue 11,2001, Pages 696-698, doi:10.3760/j.issn:0529-567X.2001.11.023
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 36, Issue 11,2001, Pages 660-662, doi:10.3760/j.issn:0529-567X.2001.11.006
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 36, Issue 11,2001, Pages 693-695, doi:10.3760/j.issn:0529-567X.2001.11.022
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 36, Issue 11,2001, Pages 689-690, doi:10.3760/j.issn:0529-567X.2001.11.020
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 36, Issue 11,2001, Pages 651-653, doi:10.3760/j.issn:0529-567X.2001.11.003